Letcher County, KY radon potential

EPA's own radon map rates Letcher County zone 2 - moderate potential, predicting a county-wide average indoor level between 2 and 4 pCi/L. Letcher County sits at the 46th percentile nationally for radon potential — above 46 of every 100 rated counties.

Where Letcher County sits nationally

Letcher County, Kentucky is home to about 20,139 people across 337.934 square miles. Averaged across its land area, Letcher County runs about 60 people per square mile. Within its own EPA zone, Letcher County is bigger by population than 39% of the counties that share it. EPA's geology-based Region 4 groups Letcher County with 735 other counties nationally sharing its underlying rock and soil profile.

What this actually means for a house in Letcher County

Call it a middle case: above the 1.3 pCi/L most US homes average, below the 4 pCi/L line EPA uses to recommend mitigation — that's Letcher County's Zone 2 prediction. Middle-of-the-pack doesn't mean risk-free for any one Letcher County address — a moderate county average still leaves individual homes to test either side of it.

Next steps for a home in Letcher County

A short-term test kit is the standard first step and typically costs far less than mitigation itself. If a test comes back at or above 4 pCi/L, a radon mitigation system for a typical home runs roughly $800–$2,500 (around $1,200 for a common single-family install), driven mainly by foundation type, not by county.

Find Kentucky's state radon program

For Letcher County, an ongoing number beats a one-time test - a Airthings radon monitor tracks Letcher County's levels over time. RadonZoneCheck earns a commission there, at no extra cost to you. Code RADONZONE-10OFF takes 10% off at checkout.

Where Letcher County's figures come from

Every figure on this page traces to EPA's own Map of Radon Zones and Census data, documented in the methodology guide. The guide to what a radon zone actually means covers why testing matters in every zone, not just Zone 1.